Shoe-sole vulcanizing and applying apparatus.



PATENTED MAY 22, 1906.

G. F. BUTTERFIELD. SHOE SOLE VULCANIZINGA-ND APPLYI'NG APPARATUS.

PPLIOATION FILED MAYZB. 1905.

2 ASHElliTS--SHEBT 1.

y TA/ LSSS No. 821,336. PATBNTED MAY 22, 190e. G. P. BUTTERFIELD.

i SHOE SOLEVULCANIZIN-G ANDAPPLYNG APPARATUS. V

APPLICATION MLBD MAY 29.1.1905.

z SHBETS-SHEET 24 by hand the tuli pressure required, so these` lteys orWedges 2O merely serve to hold the parts together untilgreatly-increased pressure can be applied, when the frames areintroduced for a time into the press. Before this, however, l bringtogether the clamps or presser-plates 21 against the sides of the shoeat the under side (in the drawings) of the Welt 3G. To facilitate this,the edges of abutment-plates and ledges l2- are slightly beveled, asshown at 3T, 1Fig. fi, and again in Fig. 6. Springs 24 are normallyunder considerable compression, and a further slight com-` pression isnecessary to pla-ce plates 2] properly in position. Threaded rods orbolts 25 serve to bring clamps 2l together as 'liar as the shoe willpermit, and the adjustable bars 27 Will close any remainingaperture. Theparts being tl'ius assembled, the frame is ready to reeeiveheat andpressure and is placed in a suitable press, and current is then appliedto the heater it) by means ot bindingposts 3S. As pressure is appliedany yielding of mold-plate i6 taken up by keys 20, and presser-plates 2lyielihagainst the action of springs 2li, so as not to in anyY way limitthe amount oi' pressure against the foot-forni 15. lllhen sullicientpressure has been. applied and the yielding oi' the parts .has beentaken up by keys or ivedg e120, the press is no longer needed, and mylrame is then removed to a suitable platform and subjected to acontinuance of heat under the requisite pressure until propervulcanization has taken lace.

lt will thus be observed that my frame in no Way depends upon. thepressing agency for heat, and such agency can be `freed for other-usesoon my Wedges l() have taken up the pre sure so applied.

lt oi' course understood 'that the specific form of frame here shown canbe v aried without departing from the spirit oi my invention. The wholeapparatus inlay be inverted, so that the relative positions 4ol the baseand mold-plate (shown in Fig. l) will be reversed, the heating-chamberbeing at the bottom instead of the top of the `frame. li steam isemployed as a heating medium, this reversed position will be preferableunless the connections are through flexible pipes.

l claim as my invention- Lain a vulcanizing apparatus, a holdingramehaving a body or base portion and terminalupriglits and an intermediatesupporting device erected on said base for the article under treatment,in combination with a mold-plate to receive the rubber and'apply it tosaid article, and formed With a chamber or space adapted to receive theheating means for vulcanizing the rubber, and with pressure mechanismfor holding the parts in close contact during the operation, suolicombined. mold-plate and heatin -chamber and such article and pressuremec anism being together removable in said frame from the press, Withoutinterrupting the vulcanzing operation, substantially as set forth.

2. In a vulcanizing apparatus, a shoe-holding trame having a base,terminal upriglits and an intermediate last or foot-form erected on saidbase for the shoe under treatment, in combination with a relativelymovable section comprising a mold-plate and heating device formedintegral, made removable from the end posts but connected thereto bypressure devices, and with marginal clamps iitting the outlines oi theshoe vand transverse sliding bars at the mold ends to prevent'the escapeor' rubber, substantially as set iorth.

3. ln a vulcanizing apparatus, a shoe-holda base, terminal nprights andan intermediate last or foot-form secured thereon, in combination With atop section comprising an inverted mold,- plate and a heating-chamberabove and. adjacent thereto, and With marginal lamps for the shoe edgesarranged for lateral adjustment, the heated air rising :troni suchelevated chamber produ cing no injurious eiiect upon theleather ot theshoe-body during vulcanization, substantially as set forth.

4. ln a vulcanizing apparatus, a shoe-holding irame having a base,vertical end posts provided with transverse keyways and an intermediatelast or foot-form secured to said base, in combination with a removabletop section recessed to admit the upper ends of the end posts andcomprising a sole-shaped mold and a heating device vformed integral,suoli top section extending ndr-'mally somewhat above the end posts,secured thereto by keys in said leyways, and adapted to be presseddownwardly by the platens oi" a press in which said treme may be placedfor additional pressure vwhen required, substantially as set forth.

5. in a vulcanizing apparatus, a shoe-holding frame having a base, alast or foot-form erected thereon, vertical end posts with terminalpressure devices and projecting ledges at an intermediate point, incombination With marginal clamps for the shoe edges yieldinglysupported'upon said ledges, a removable top section'comprising amold-plate to receive the rubber and a heating device for vulcanizingi-t, such section having a limited vertical movement With relation tothe ing trame having foot-torni and clamps, varying according to theamount and nature 'oi' the pressure exerted, substantially set forth.

6. In a vulcanizing apparatus, a shoe-holding `ira-me having .a base, alast or loot-form erected thereon, vertical end posts with 'terminalpressure devices, projecting ledges at an intermediate point, andabutment-plates resting on such ledges, in combination with an integralmold-plate and heating device', marginal clamps ior the sole edges,springs interposed. between such clamps and the IOO esteseabutment-plates and adjusting-screwsholding said springs to the clampsin proper position,lsubstantially as set forthn 7. In avulcanizingapparatus, a shoe-hold `ing'frame having vertical end posts and anintermediate last. or foot-form erected on the base thereof,lincombinationwith a removable top section comprising an inverted moldplateto receive the rubber and a heating device for vulcanizing it, saidsection being recessed to admit the end posts to which it is appliedverticall apair of mar inal clamps -conformin to t e outlines of t eshoeandv adapted to receive .a body of vulcanizable or ,semivulcanizedrubber compound, a shoeholding frame connected thereto yand'comprising afoot-form and marginal clamps to secure the shoe in position and controlthe tical end posts erected on its base portion, 1n

rubber during treatment, in combination A with vulcanizing apparatusactuated `by an electric heating-current, and with efficient pressuremechanism, servin to hold the shoeottom rmly upon the ru ber in the moldwith the clamps in proper marginal position during the vulcanizingoperation, substantially as set forth. A

9. In a vulcanizing' apparatus, a shoeholding frame having a last orfoot-form and ve r-.

combinatlon with a mold ,-plate, heating means and pressure mechanismfor applying and vulcanizing the rubber sole, and marginal clamps to aidin confining-the rubber in the mold, and with insulating materialinterposed between thel marginal clamps andthe shoe and between theheatedl mold-plate and the frame-posts, to limit the conduction of heatto the shoe, substantially as set forth.`

In testimony whereof I have affixed my signature in presence of twoWitnesses.

GEORGE F. BUTTERFELD.

Witnesses: y

A. H. SPENCER, H. W. Lann.

